package com.kele.config;

import com.kele.pojo.User;
import com.kele.service.UserService;
import com.sun.org.apache.xerces.internal.impl.xpath.XPath;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.springframework.beans.factory.annotation.Autowired;
import org.yaml.snakeyaml.events.Event;

public class UserRealm extends AuthorizingRealm {
    @Autowired
    UserService userService;

    //授权
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        System.out.println("执行了 => 授权 doGetAuthorizationInfo");
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //info.addStringPermission("user:add");

        //拿到当前登录的这个对象
        Subject subject = SecurityUtils.getSubject();
        User currentUser = (User) subject.getPrincipal();

        //设置当前用户的权限
        info.addStringPermission(currentUser.getPerms());
        return info;
    }

    //认证
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        System.out.println("执行了 => 认证 doGetAuthorizationInfo");

        UsernamePasswordToken userToken =  (UsernamePasswordToken) token;
        //连接真实的数据库
        User user = userService.queryUserByName(userToken.getUsername());
        if (user == null){//没有这个人
            return null; // 抛出异常  UnknownAccountException
        }
        //密码认证shiro帮我们去做
        return new SimpleAuthenticationInfo(user,user.getPwd(),"");
    }
}
